H.D.H. Instruments is a family owned and operated company specializing in deep hole boring, honing and machining of precision bars and tubes. Established in 1978, H.D.H. Instruments has built a reputation around three key drivers: cost efficiency, top line quality, and on-time delivery. With over 200,000 square feet of manufacturing capacity, H.D.H. Instruments is able to satisfy the fluctuating demands of the Oil & Energy industries and beyond. Whether single parts or thousands of feet at a time, we can handle your needs effectively and efficiently. The focus of our business has always been to provide the highest level of customer service possible, and H.D.H. continues to add capacity and develop new technologies and methods to move the needle in the industry. We specialize in a wide variety of material grades including: Low Alloy Steel, Chrome, Inconel, Nickel Alloys, Aluminum, Duplex, Stainless, Carbon, Titanium, Non-Magnetic, Tool Steel, Monel, & More....... *Gundrilling: .055" - 1.500", Up to 120" long *Solid Drilling / Reaming: .950" - 8.406", Up to 380" long *Trepanning: 5.000" - 14.000", Up to 200" long *Honing: .0625" - .484", Up to 14" long .485" - 1.749", Up to 360" long 1.750" - 16.000", Up to 600" long *Turning: Up to 24" OD and 396" long Specializing in Precision, Concentric Tubes